CN104091432A - Wireless sensor node system based on high-speed gear box - Google Patents
Wireless sensor node system based on high-speed gear box Download PDFInfo
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- CN104091432A CN104091432A CN201410329233.6A CN201410329233A CN104091432A CN 104091432 A CN104091432 A CN 104091432A CN 201410329233 A CN201410329233 A CN 201410329233A CN 104091432 A CN104091432 A CN 104091432A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 12
- 238000004146 energy storage Methods 0.000 claims description 4
- 230000001131 transforming effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 11
- 238000005070 sampling Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A wireless sensor node system based on a high-speed gear box is characterized by comprising a sensing and signal acquisition module, an anti-aliasing circuit, an A/D acquisition module, an SoC FPGA system module, a data processing module, an SD memory, a ZigBee wireless radio frequency module, a GPRS wireless communication module, a lithium battery charging module, a battery voltage monitoring module and a micro vibration generator module. By using the wireless sensor node system based on the high-speed gearbox, the problems of high cost, complex wiring, poor flexibility, difficult maintenance and the like caused by a wired monitoring system can be effectively solved. The wireless sensor node system based on the high-speed gearbox can be applied to high-speed occasions, and is not only used in the fields of low-speed and slowly-varying signals. The invention adopts a high-performance MEMS sensor, a designed anti-aliasing circuit, an externally-developed high-capacity SD card and introduces a compressed sensing technology, thereby effectively solving the problems of missing acquisition, frame loss and the like of a large amount of data generated in the process of monitoring the high-speed gearbox.
Description
Technical field
The present invention relates to technical field of wireless, particularly relate to high-speed gear box vibration monitor system, specifically a kind of wireless sensor node system based on high-speed gear box.
Background technology
Gear case is as the requisite part of large rotating machinery, and its operating mode plays vital effect to the operation of whole equipment.Due to gear box arrangement complex structure, operating mode is special, causes existing high failure rate, so gear case is monitored and seemed very important.Gear case is often accompanied by the generation of vibration in the time of work, can cause the abnormal increase of vibration while breaking down, and the energy distribution of vibration signal changes, and therefore often utilizes vibration analysis method to diagnose the fault of gear case.For the operation characteristic of gear case, traditional line monitoring system that has is mainly monitored the vibration characteristics of gear case, the especially monitoring to acceleration.But the shortcoming outwardness of wired monitoring network: wiring complexity, poor reliability, cost are high and lack the problems such as dirigibility.
Wireless sensor network is just being widely used in the fields such as agricultural, medical science, bridge, household, machinery at present, but gear case is different from standard machinery equipment, and its high speed, powerful feature have been brought very large trouble to monitoring.Mainly contain following some: 1. high-speed gear box in monitoring can produce mass data, because wireless transmission rate is lower, how to ensure the transmission that data can be complete.2. the main energy consumption in node operational process is at tcp data segment, and high frequency sampling can consume fast the node energy and make node failure.For this problem, the suitable wireless communication mode of this How to choose is to ensure stability and the low-power consumption characteristic of system.3. wireless sensor node generally adopts powered battery, and battery life is limited, and constantly changing battery can be to environment.If but adopt rechargeable battery power supply, this How to choose of the charging modes of battery, or can have other energy substitution powered battery.
In wireless sensor network, due to the resource-constrained feature such as node storage capacity and node energy, how to reduce the data volume of collection, thereby fundamentally reduce the consumption of each node energy, the present invention proposes compressed sensing technology.
Compressed sensing is the correlativity of utilizing between data, greatly less transmission and the storage of data in network.The long and reusable feature of field programmable gate array (FPGA) for SOC (system on a chip) (SoC) construction cycle, the present invention adopts high speed, Low Power SoC FPGA system as processor, and this system not only can be programmed and be also had abundant peripheral hardware.
Do not have on the market at present a wireless sensor node to meet the requirement of high-speed gear box vibration monitoring.Therefore, need a kind of wireless sensor node system based on high-speed gear box badly.
Summary of the invention
The object of the present invention is to provide a kind of wireless sensor node system based on high-speed gear box, the problem that this system is brought for wired monitoring network, wireless sensor node system based on high-speed gear box of the present invention is a kind of distributed, programmable wireless sensor network node system, have low in energy consumption, cost is low, real-time good, dirigibility is good, environmental suitability is strong, the feature such as energy-conservation, can effectively solve the shortcoming of traditional wired monitoring network.
Technical scheme of the present invention is for achieving the above object:
A kind of wireless sensor node system based on high-speed gear box, comprise sensing and signal acquisition module, anti-aliasing circuit, A/D acquisition module, SoC FPGA system module, data processing module, SD storer, ZigBee wireless radio frequency modules, GPRS wireless communication module, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module, described sensing is connected anti-aliasing circuit with signal acquisition module, anti-aliasing circuit is connected with data processing module by A/D acquisition module, data processing module connects SoC FPGA system module, SD storer connection data processing module and ZigBee wireless radio frequency modules, ZigBee wireless radio frequency modules is connected GPRS wireless communication module by ZigBee wireless routing network with ZigBee telegon, GPRS wireless communication module connects industrial computer by GPRS network, ZigBee telegon is connected with industrial computer by USB interface, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module connect SoC FPGA system module.
Described sensing and signal acquisition module are ADXL001 sensor, and vibration measuring scope is ± 70g that resonance frequency is 22kHz.
Described SD storer is mini SD card, and data are read and write to SD card with FATFS file layout.
Described miniature vibration electric generator module is converted into electric energy by the energy of vibration in high-speed gear box operation process and deposits energy storage device in, in the time that the electric energy transforming is not enough, can automatically switch to lithium battery power supply pattern.
Described signal processing module has been introduced advanced compressive sensing theory.
In order to solve the unmatched problem of acquisition rate and transfer rate, outside adopting, open up SD card as data buffer.
According to the length of transmission range, stability, the dirigibility of collateral security signal transmission and the angle reducing costs are considered, select the hybrid wireless transmission mode of ZigBee technology collocation GPRS technology.
Due to the charging modes of battery and need the problems such as constantly replacings to restrict the development of wireless sensor network node, propose to adopt other energy replacement powered battery here.Because monitoring target is the gear case running up, be chosen in here on node and add a miniature vibration electric generator, the mechanical energy in gear case operation process is converted into electric energy and powers to node.
When the electric energy that provides when the method for above-mentioned employing is not enough, adopt powered battery.This node adopts rechargeable battery and designs charging circuit, ensures that battery can recycle.Simultaneously this charging circuit can Real-Time Monitoring battery electric quantity, prevents and overcharges or overdischarge phenomenon.
Because the node energy mainly consumes in data, so this modal processor part adopts low-power consumption, programmable SoC FPGA system, and introduce compressed sensing technology.
The invention has the beneficial effects as follows:
Use the wireless sensor node system based on high-speed gear box of the present invention, can effectively solve that the cost that wired monitoring system brings is high, wiring complexity, very flexible, the difficult problem such as difficult in maintenance.Should can be applied to high speed situation by the wireless sensor node system based on high-speed gear box, and not only for low speed, tempolabile signal field.
Wireless sensor node system based on high-speed gear box of the present invention adopts the anti-aliasing circuit of high-performance MEMS sensor, design and opens up large capacity SD card outward, has effectively solved the mass data producing and can leak and adopt, lose the problems such as frame in monitoring high-speed gear box process.
Wireless sensor node system based on high-speed gear box of the present invention adopts the hybrid wireless transmission mode of ZigBee technology collocation GPRS technology, is ensureing to reduce on the basis of node cost, power consumption, has ensured the stability of node data transmission.
The present invention adopts programmable SoC FPGA system, is convenient to introduce this data processing technique of compressed sensing, simultaneously also with a lot of peripheral hardwares to expand.Compressed sensing is obtained signal with extremely low sampling rate, and can restore truly original signal with minute quantity signal, has greatly reduced the transmission quantity of data.
Wireless sensor node system based on high-speed gear box of the present invention is also suited measures to local conditions, and adopts the pattern of battery and energy of vibration hybrid power supply, has effectively reduced environmental pollution, improves energy utilization rate.
Brief description of the drawings
Fig. 1 is the wireless communication configuration schematic diagram of the wireless sensor node system based on high-speed gear box of the present invention.
Fig. 2 is the wireless sensor node structural representation of the wireless sensor node system based on high-speed gear box of the present invention.
Fig. 3 is the data compression pattern diagram based on compressed sensing of the wireless sensor node system based on high-speed gear box of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described in further detail.
Referring to Fig. 1, 2, a kind of wireless sensor node system based on high-speed gear box, comprise sensing and signal acquisition module, anti-aliasing circuit, A/D acquisition module, SoC FPGA system module, data processing module, SD storer, ZigBee wireless radio frequency modules, GPRS wireless communication module, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module, described sensing is connected anti-aliasing circuit with signal acquisition module, anti-aliasing circuit is connected with data processing module by A/D acquisition module, data processing module connects SoC FPGA system module, SD storer connection data processing module and ZigBee wireless radio frequency modules, ZigBee wireless radio frequency modules is connected GPRS wireless communication module by ZigBee wireless routing network with ZigBee telegon, GPRS wireless communication module connects industrial computer by GPRS network, ZigBee telegon is connected with industrial computer by USB interface, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module connect SoC FPGA system module.
Sensing and signal acquisition module are ADXL001 sensor, and vibration measuring scope is ± 70g that resonance frequency is 22kHz.
SD storer is mini SD card, and data are read and write to SD card with FATFS file layout.
Miniature vibration electric generator module is converted into electric energy by the energy of vibration in high-speed gear box operation process and deposits energy storage device in, in the time that the electric energy transforming is not enough, can automatically switch to lithium battery power supply pattern.
Sensor section is selected high performance ADXL001 sensor, as the MEMS sensor of first high bandwidth vibration and impact, has the characteristics such as wide bandwidth, small size, low-power consumption.Reach ± 70g of vibration measuring scope, resonance frequency is 22kHz.[0021] after MEMS vibration-measuring sensor, connect anti-aliasing circuit, prevent signal frequency generation aliasing, the cutoff frequency of node of the present invention is up to 50KHz.
Processor select there is high-performance, programmable SoC FPGA system is core, the existing peripheral hardware that enriches can carry out again complicated algorithm computing, and introduces on this basis compressed sensing data processing method.
Referring to Fig. 3, compressed sensing is exactly in image data, data to be compressed, only need be far fewer than just energy Accurate Reconstruction original signal of " aromatic sampling law " desired hits.Now sampling rate no longer depends on signal bandwidth, and depends on sparse property.Compressed sensing comprises that rarefaction representation to signal, design just measuring square and this three part of restructing algorithm.
In order to reduce system power dissipation, this node adopts MCU to carry A/D conversion, can obtain required sampling rate by changing ADC clock frequency and sampling time.
Because high-speed gear box can produce mass data in observation process, because wireless telecommunications speed is lower, select SD card as data buffer here.In order to reduce node area, select mini SD card.Node deposits the data that collect in SD card, then by wireless module, the data in SD card is slowly sent.Data are read and write to SD card with FATFS file layout, effectively management data.
Because wireless sensor node adopts powered battery, battery electric quantity is limited, so must select low-power consumption components and parts to reduce energy loss in design process as far as possible.For this requirement of low-power consumption, the hybrid wireless transmission mode of node ZigBee technology collocation GPRS technology of the present invention.When short-distance transmission, adopt ZigBee communication mode, when long Distance Transmission, adopt GPRS communication modes.ZigBee communication mode advantage is low-power consumption, and GPRS module advantage is its two-forty.
Wireless sensor node adopts powered battery, and this node adopts chargeable lithium cell power supply, and has designed charging circuit and voltage monitoring circuit.Real-Time Monitoring battery electric quantity, can prevent from overcharging cause with overdischarge battery damage.
In some complex environments, the charging modes of battery is restricting the development of wireless sensor node.The present invention suits measures to local conditions, and selects miniature vibration electric generator, the energy of vibration in high-speed gear box operation process is converted into electric energy and deposits energy storage device in.In the time that the electric energy transforming is not enough, can automatically switch to lithium battery power supply pattern.
The present invention is more intelligent for node moves, and on node, external multiple light emitting diodes, can show node operation conditions in real time.
Wireless sensor network node specific works flow process of the present invention is as follows: first opening power, the each module device of initialization; Sensor assembly is by the data process anti-aliasing circuit input a/d converter, now the system limit collection limit packed data that collect; With dma mode, data are write to SD card by SPI interface again; By serial ports, data in SD card are read in to ZigBee module or GPRS module, then send to host computer, to data be reconstructed and monitor, preserve, the operation such as processing; When node does not collect data within a period of time, wireless module can be closed automatically, makes node enter dormant state, in the time having data, starts wireless module by processor; In whole system operational process, power supply employing is changed the energy and is powered as main, and powered battery is auxiliary powering mode.
Embodiment recited above is described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; various modification and improvement that in this area, common engineering technical personnel make technical scheme of the present invention; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention has all been documented in claims.
Claims (5)
1. the wireless sensor node system based on high-speed gear box, it is characterized in that comprising sensing and signal acquisition module, anti-aliasing circuit, A/D acquisition module, SoC FPGA system module, data processing module, SD storer, ZigBee wireless radio frequency modules, GPRS wireless communication module, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module, described sensing is connected anti-aliasing circuit with signal acquisition module, anti-aliasing circuit is connected with data processing module by A/D acquisition module, data processing module connects SoC FPGA system module, SD storer connection data processing module and ZigBee wireless radio frequency modules, ZigBee wireless radio frequency modules is connected GPRS wireless communication module by ZigBee wireless routing network with ZigBee telegon, GPRS wireless communication module connects industrial computer by GPRS network, ZigBee telegon is connected with industrial computer by USB interface, lithium cell charging module, battery voltage monitoring module and miniature vibration electric generator module connect SoC FPGA system module.
2. the wireless sensor node system based on high-speed gear box according to claim 1, is characterized in that described sensing and signal acquisition module are ADXL001 sensor, and vibration measuring scope is ± 70g that resonance frequency is 22kHz.
3. the wireless sensor node system based on high-speed gear box according to claim 1, is characterized in that described SD storer is mini SD card, reads and writes SD card by data with FATFS file layout.
4. the wireless sensor node system based on high-speed gear box according to claim 1, it is characterized in that described miniature vibration electric generator module is converted into electric energy by the energy of vibration in high-speed gear box operation process and deposits energy storage device in, in the time that the electric energy transforming is not enough, can automatically switch to lithium battery power supply pattern.
5. the wireless sensor node system based on high-speed gear box according to claim 1, is characterized in that described signal processing module introduced advanced compressive sensing theory.
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| CN201410329233.6A CN104091432A (en) | 2014-07-10 | 2014-07-10 | Wireless sensor node system based on high-speed gear box |
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| CN201410329233.6A CN104091432A (en) | 2014-07-10 | 2014-07-10 | Wireless sensor node system based on high-speed gear box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105471463A (en) * | 2015-12-29 | 2016-04-06 | 广东工业大学 | USB rechargeable ZigBee network wireless air pressure sensor |
| CN114088402A (en) * | 2021-11-22 | 2022-02-25 | 福建省德源智能科技有限公司 | Vibration monitoring system, hardware acquisition circuit board and joint bearing |
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Application publication date: 20141008 |